Home / 177,788.72-266,823.20-78,017.78

Finding the Fourth Proportional to 177,788.72, 266,823.20 and 78,017.78

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Solution

The fourth proportional to 177,788.72, 266,823.20 and 78,017.78 is: 117,088.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,788.72 : 266,823.20 = 78,017.78 : x
  2. Step 2: Convert to fraction form
    177,788.72/266,823.20 = 78,017.78/x
  3. Step 3: Cross multiply
    177,788.72x = 266,823.20 × 78,017.78
  4. Step 4: Simplify right side
    177,788.72x = 20,816,951,992.29
  5. Step 5: Solve for x
    x = 20,816,951,992.29/177,788.72
  6. Step 6: Final answer
    x = 117,088.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.